I like stuns the double stun is a lil not nice maybe lower the second stun chance by x% but whatever.
Here is the issue with stuns. If i am slower than a target let’s say ankylsaurus and i use my instant invincibility. If the guy does land the stun then i take no damage from the stun but still i get stunned. Then next turn i have to forfeit because i was faster than the target. After the stun i am slower than the target so again i take a second round without being able to defend myself.
In closing i feel that this double damage you take from getting stunned off an instant distraction or invincibility shield should be reworked. Because the worst move you can do against a stunning dinosaur is use a defensive.